Beltronics Radar Detector Coiled Smartcord (RED Display) For Beltronics models: PRO-500, PRO-300, PRO-200, PRO-100, GX65, Sti Magnum, STi Driver, RX65, RX55, 995, 965, 955, 940 There are two different versions of the 940. If your 940 has a round power jack this cord will not work.